Subj : MESO: Mesoscale Discussion 0255
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Sun Mar 05 2023 21:41:52

ACUS11 KWNS 052141
SWOMCD
SPC MCD 052141=20
MNZ000-IAZ000-SDZ000-060145-

Mesoscale Discussion 0255
NWS Storm Prediction Center Norman OK
0341 PM CST Sun Mar 05 2023

Areas affected...Southern Minnesota

Concerning...Heavy snow=20

Valid 052141Z - 060145Z

SUMMARY...Areas of wet, heavy snow are possible in southern
Minnesota this afternoon and early evening.

DISCUSSION...Ascent along an 850-700 mb frontal zone has continued
to shift eastward through the day. Subtle shortwave troughs evident
in water vapor imagery also are contributing to locally strong lift
aloft. Recent surface and dual-pol radar observations in southern
Minnesota show a broken band of heavy snowfall. KDP values from KMPX
and KFSD suggest efficient dendritic growth aloft. Furthermore,
elevated instability may contribute to locally more intense snowfall
given recent lightning flashes from NLDN. Temperatures at the
surface are generally above freezing, but dewpoints are low enough
to support evaporative cooling to around freezing within heavier
precipitation.  That, coupled with the low-level temperature profile
near freezing, will lead to a likely wet, heavy snow with perhaps
rates around an inch per hour but not necessarily significant
accumulations.

...Wendt.. 03/05/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!-LAnr32BjuQzcVYECPNvg9c2tKuF7el24Yn3PbqrNGPaqaBBkPlT7d9PisMJaINXWAfREKDcK=
E5V_W1xULzUWpfLlQ4$  for graphic product...

ATTN...WFO...ARX...MPX...DMX...FSD...

LAT...LON   44809472 44749337 44499235 43799191 43389226 43459449
            43539588 43999649 44609578 44809472=20


=3D =3D =3D
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